If I lost 500,000 in one day would my account be frozen ?
Interactive brokers do it automatically. Their software would auto liquidate.
Interactive brokers do it automatically. Their software would auto liquidate.
Only if a margin deficit. If it is a $10,000,000 account with plenty of excess liquidity, no issue. The question the OP should be asking is "If I have a broker let me lose $500,000 - assuming negative equity, is my money safe there?"